Hello,
I have looked all over the forum for several hours, I have a shut off rattle and
when I found out it could be the harmonic ballancer issue I took the pulley off
and inspected it. It checks out no play no cracks and rubber looks good.
My truck has 107,000 miles and is a 94 gmc with the 5 speed 4x4.
The sound is pretty mild and less than a cummings, but thought i should
see if it is a bad sign. Any advice would be great.

Thank you very much,

 

rattle on startup or rattle during regular running operation?

 

No just shut down, It dosnt sound like metal on metal just kind of a rattle.

 

you probably have something loose somewhere like your exhaust is hitting, etc

 

Turned out it was the flywheel it took me a whole day, 200$ and a case of beer thanks for the help gentlemen